If you've been playing more than a year or so, you recall how poison was more of a nuisance than a serious threat in the past, especially at higher character levels.
Then Update 14 came, and with it, the Spinner of Shadows, who showed all of Ebberon how poisoning is done, killing players left and right in her prison, characters who thought their Proof Against Poison gear would shield them.
Update 19 has brought these modifications to poison full circle. From the Drow of the Underdark to Arraetrikos himself, getting poisoned can be a life-threatening state in DDO without some knowledge and preparation.
That goes for you Monks, too. Your "Diamond Body" goes only so far.
Read on for more about the changes to poison.